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Digestive System

Why do enzymes in our stomach work best at a pH of 7?


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November 29, 2008 10:17PM

Actually the pH of the stomach very acid relative to pH 7 (between pH 1-4). An acidic stomach is optimal for the breaking of hydrogen bonds that makes up the complex compounds in the food we ingest, like proteins. The acidity of the stomach is generated by the excretion of hydrochloric acid (HCl) which combines with pepsinogen to create pepsin into the stomach, which is a strong acid.